CN108760755A - A kind of dust granule detection method and device - Google Patents
A kind of dust granule detection method and device Download PDFInfo
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- CN108760755A CN108760755A CN201810711063.6A CN201810711063A CN108760755A CN 108760755 A CN108760755 A CN 108760755A CN 201810711063 A CN201810711063 A CN 201810711063A CN 108760755 A CN108760755 A CN 108760755A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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Abstract
A kind of dust granule detection method and device that the embodiment of the present invention proposes, second image on the surface of the product to be detected is acquired using first image on the surface for acquiring the product to be detected on the direction of the vertical product surface to be detected respectively and on the direction with the product surface to be detected in the second predetermined angle, compare the imagery zone of same object in the first image and the second image, if region shape differs, it is determined that there are dust granules on the surface of product to be detected.Dust granule and color spot effectively and quickly can be distinguished using the present invention, avoid error detection.
Description
Technical field
The present embodiments relate to dust detection technique fields, and in particular to a kind of dust granule detection method and device.
Background technology
In field of visual inspection, especially mobile phone industry detection, there is extra high requirement to mobile phone screen and appearance,
One small dust/particle can all cause the bad of product, and these defects/bad, the eyes of people be it is very undistinguishable, i.e.,
Make also difficult discernable under particularly preferred illumination.Then a large amount of industrial vision is produced, by single line is swept, two-wire is swept, high
The methods of pixel faces battle array detects dust granule.
But existing technology has the following disadvantages：Under special polishing environment, image and color in kind have changed,
It is difficult to differentiate color spot or dust granule.
Invention content
In order to solve the above-mentioned technical problem above-mentioned technical problem or is at least partly solved, an embodiment of the present invention provides
A kind of dust granule detection method and device.
In view of this, in a first aspect, the embodiment of the present invention provides a kind of dust granule detection method, including：
The surface of the product to be detected is irradiated with the directional light perpendicular to product surface to be detected；
First image on the surface of the product to be detected is acquired on the direction of vertical product surface to be detected；
After the completion of described first image acquisition, shone in the directional light of the first predetermined angle with the product surface to be detected
Penetrate the surface of the product to be detected；
The surface of the product to be detected is acquired on the direction with the product surface to be detected in the second predetermined angle
The second image；
Identify object in described first image the first imagery zone and object in second image second
Imagery zone；
Compare the first imagery zone of the object and the second imagery zone of the object, if the object
Second imagery zone shape of the first imagery zone and object differs, then there are dusts on the surface of the product to be detected.
Optionally, after acquiring first image on surface of the product to be detected, further include：
Close the directional light perpendicular to product surface to be detected.
Optionally, identify object in described first image the first imagery zone and second image in object
The second imagery zone, including：
The random patch identified in described first image, using the patch as the first imagery zone of object；
Determine the position of the first imagery zone of the object；
The position is searched in second image, and using the patch on position described in second image as mesh
Mark the second imagery zone of object.
Optionally, the method further includes：
Compare the first imagery zone of the object and the second imagery zone of the object, if the object
First imagery zone is identical with the second imagery zone shape of object, then dust is not present in the surface of the product to be detected.
Optionally, first predetermined angle is less than 90 degree, and second predetermined angle is more than first preset angle
Degree.
Second aspect, the embodiment of the present invention provide a kind of dust granule detection device, including：
Perpendicular light source, for generating the directional light irradiated perpendicular to product surface to be detected,
First image collecting device, for acquiring the product to be detected on the direction of vertical product surface to be detected
First image on surface；
Skew ray source, for generating the directional light with the product surface to be detected in the first predetermined angle；And the skew ray
The directional light that source generates irradiates the surface of the product to be detected after the completion of the first Image Acquisition；
Second image collecting device, for being acquired on the direction with the product surface to be detected in the second predetermined angle
Second image on the surface of the product to be detected；
Identification device goes out for identification in the first imagery zone and second image of object in described first image
Second imagery zone of object；
Comparison means, the second imagery zone of the first imagery zone and the object for the object,
If the first imagery zone of the object and the second imagery zone shape of object differ, the product to be detected
There are dusts on surface.
Optionally, the dust granule detection device further includes：
Control device, for closing the perpendicular light source after the completion of described first image acquisition.
Optionally, the identification device includes：
Recognition unit, for identifying the patch in described first image at random, using the patch as object first
Imagery zone；
Position determination unit, the position for determining the first imagery zone of the object；
Searching unit, for searching the position in second image, and by position described in second image
On patch as the second imagery zone of object.
Optionally, first predetermined angle is less than 90 degree, and second predetermined angle is more than first preset angle
Degree.
Optionally, described first image harvester is area array cameras.
Optionally, second image collector is set to line and sweeps camera.
The third aspect, the embodiment of the present invention also propose a kind of non-transient computer readable storage medium, the non-transient meter
Calculation machine readable storage medium storing program for executing stores computer instruction, and the computer instruction makes the computer execute side as described in relation to the first aspect
The step of method.
Compared with prior art, a kind of dust granule detection method that the embodiment of the present invention proposes, using respectively in vertical institute
State the surface that the product to be detected is acquired on the direction of product surface to be detected the first image and with the production to be detected
Product surface in the second predetermined angle direction on acquire the product to be detected surface the second image, compare the first image and
The imagery zone of same object in second image, if region shape differs, it is determined that the surface of product to be detected has ash
Dirt particle.Dust granule and color spot effectively and quickly can be distinguished using the present invention, avoid error detection.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment or description of the prior art
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the present invention
Example is applied, it for those of ordinary skill in the art, without having to pay creative labor, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is a kind of flow chart for dust granule detection method that the embodiment of the present invention one provides；
Fig. 2 is a kind of flow chart of dust granule detection method provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of schematic diagram for dust granule detection device that another embodiment of the invention provides；
Reference numeral：
1. the first image collecting device；2. perpendicular light source；3. the second image collecting device；4. skew ray source；5. production to be detected
Product.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
Referring to Fig.1, Fig. 1 provides a kind of dust granule detection method for the embodiment of the present invention, including：
The surface of the product to be detected is irradiated with the directional light perpendicular to product surface to be detected；
First image on the surface of the product to be detected is acquired on the direction of vertical product surface to be detected；
After the completion of described first image acquisition, shone in the directional light of the first predetermined angle with the product surface to be detected
Penetrate the surface of the product to be detected；
The surface of the product to be detected is acquired on the direction with the product surface to be detected in the second predetermined angle
The second image；
Identify object in described first image the first imagery zone and object in second image second
Imagery zone；
Compare the first imagery zone of the object and the second imagery zone of the object, if the object
Second imagery zone shape of the first imagery zone and object differs, then there are dusts on the surface of the product to be detected.
Optionally, identify object in described first image the first imagery zone and second image in object
The second imagery zone, including：
The random patch identified in described first image, using the patch as the first imagery zone of object；
Determine the position of the first imagery zone of the object；
The position is searched in second image, and using the patch on position described in second image as mesh
Mark the second imagery zone of object.
Optionally, first predetermined angle is less than 90 degree, and second predetermined angle is more than first preset angle
Degree.
Embodiment two
A kind of dust granule detection method is provided for the embodiment of the present invention with reference to Fig. 2, Fig. 2, including：
The surface of the product to be detected is irradiated with the directional light perpendicular to product surface to be detected；
First image on the surface of the product to be detected is acquired on the direction of vertical product surface to be detected；
After the completion of described first image acquisition, the directional light perpendicular to product surface to be detected is closed；
With the surface for irradiating the product to be detected in the directional light of the first predetermined angle with the product surface to be detected；
The surface of the product to be detected is acquired on the direction with the product surface to be detected in the second predetermined angle
The second image；
Identify object in described first image the first imagery zone and object in second image second
Imagery zone；
Compare the first imagery zone of the object and the second imagery zone of the object, if the object
Second imagery zone shape of the first imagery zone and object differs, then the surface of the product to be detected is there are dust,
Otherwise, dust is not present in the surface of the product to be detected.
Optionally, identify object in described first image the first imagery zone and second image in object
The second imagery zone, including：
The random patch identified in described first image, using the patch as the first imagery zone of object；
Determine the position of the first imagery zone of the object；
The position is searched in second image, and using the patch on position described in second image as mesh
Mark the second imagery zone of object.
Optionally, first predetermined angle is less than 90 degree, and second predetermined angle is more than first preset angle
Degree.
Embodiment three
A kind of schematic diagram of dust granule detection device is provided for the embodiment of the present invention with reference to Fig. 3, Fig. 3, including：
Perpendicular light source 2, for generating the directional light irradiated perpendicular to 5 surface of product to be detected,
First image collecting device 1, for acquiring the product to be detected on the direction on vertical 5 surface of product to be detected
First image on 5 surface；
Skew ray source 4, for generating the directional light with 5 surface of product to be detected in the first predetermined angle；And it is described oblique
The directional light that light source 4 generates irradiates the surface of the product 5 to be detected after the completion of the first Image Acquisition；
Second image collecting device 3, for being adopted on the direction with 5 surface of product to be detected in the second predetermined angle
Collect second image on the surface of the product to be detected 5；
Identification device goes out for identification in the first imagery zone and second image of object in described first image
Second imagery zone of object；
Comparison means, the second imagery zone of the first imagery zone and the object for the object,
If the first imagery zone of the object and the second imagery zone shape of object differ, the product 5 to be detected
There are dusts on surface.
Optionally, the dust granule detection device further includes：Sliding rail and with the matched sliding block of the sliding rail；
The product to be detected 5 is arranged on the sliding block.
Optionally, the dust granule detection device further includes：
Control device, for closing the perpendicular light source after the completion of described first image acquisition.
Optionally, the identification device includes：
Recognition unit, for identifying the patch in described first image at random, using the patch as object first
Imagery zone；
Position determination unit, the position for determining the first imagery zone of the object；
Searching unit, for searching the position in second image, and by position described in second image
On patch as the second imagery zone of object.
Optionally, first predetermined angle is less than 90 degree, and second predetermined angle is more than first preset angle
Degree.
Optionally, first predetermined angle and second predetermined angle are adjustable.
Optionally, described first image harvester is area array cameras.
Optionally, second image collector is set to line and sweeps camera.
Through the above description of the embodiments, those skilled in the art can be understood that each reality of the present invention
Applying the method described in example can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware,
But the former is more preferably embodiment in many cases.Based on this understanding, technical scheme of the present invention is substantially in other words
The part that contributes to existing technology can be expressed in the form of software products, which is stored in one
In a storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions are used so that a station terminal equipment (can be hand
Machine, computer, server, air conditioner either network equipment etc.) execute method or implementation described in each embodiment of the present invention
Method described in certain parts of example.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (11)
1. a kind of dust granule detection method, which is characterized in that including：
The surface of the product to be detected is irradiated with the directional light perpendicular to product surface to be detected；
First image on the surface of the product to be detected is acquired on the direction of vertical product surface to be detected；
After the completion of described first image acquisition, institute is irradiated in the directional light of the first predetermined angle with the product surface to be detected
State the surface of product to be detected；
The of the surface of the product to be detected is acquired on the direction with the product surface to be detected in the second predetermined angle
Two images；
Identify the first imagery zone of object in described first image and the second image of object in second image
Region；
Compare the first imagery zone of the object and the second imagery zone of the object, if the first of the object
Second imagery zone shape of imagery zone and object differs, then there are dusts on the surface of the product to be detected.
2. dust granule detection method according to claim 1, which is characterized in that in the table for acquiring the product to be detected
After first image in face, further include：
Close the directional light perpendicular to product surface to be detected.
3. dust granule detection method according to claim 1, which is characterized in that identify target in described first image
Second imagery zone of object in first imagery zone of object and second image, including：
The random patch identified in described first image, using the patch as the first imagery zone of object；
Determine the position of the first imagery zone of the object；
The position is searched in second image, and using the patch on position described in second image as object
Second imagery zone.
4. dust granule detection method according to claim 1, which is characterized in that the method further includes：
Compare the first imagery zone of the object and the second imagery zone of the object, if the first of the object
Imagery zone is identical with the second imagery zone shape of object, then dust is not present in the surface of the product to be detected.
5. dust granule detection method according to claim 1, which is characterized in that first predetermined angle is less than 90
Degree, and second predetermined angle is more than first predetermined angle.
6. a kind of dust granule detection device, which is characterized in that including：
Perpendicular light source, for generating the directional light irradiated perpendicular to product surface to be detected,
First image collecting device, the surface for acquiring the product to be detected on the direction of vertical product surface to be detected
The first image；
Skew ray source, for generating the directional light with the product surface to be detected in the first predetermined angle；And the skew ray source production
Raw directional light irradiates the surface of the product to be detected after the completion of the first Image Acquisition.
Second image collecting device, described in the acquisition on the direction with the product surface to be detected in the second predetermined angle
Second image on the surface of product to be detected；
Identification device, go out for identification object in described first image the first imagery zone and second image in target
Second imagery zone of object；
Comparison means, the second imagery zone of the first imagery zone and the object for the object, if institute
Second imagery zone shape of the first imagery zone and object of stating object differs, then the surface of the product to be detected
There are dusts.
7. dust granule detection device according to claim 6, which is characterized in that further include：
Control device, for closing the perpendicular light source after the completion of described first image acquisition.
8. dust granule detection device according to claim 6, which is characterized in that the identification device includes：
Recognition unit, for identifying the patch in described first image at random, using the patch as the first image of object
Region；
Position determination unit, the position for determining the first imagery zone of the object；
Searching unit, for searching the position in second image, and will be on position described in second image
Patch is as the second imagery zone of object.
9. dust granule detection device according to claim 6, which is characterized in that
First predetermined angle is less than 90 degree, and second predetermined angle is more than first predetermined angle.
10. dust granule detection device according to claim 6, which is characterized in that
Described first image harvester is area array cameras.
11. dust granule detection device according to claim 6, which is characterized in that
Second image collector is set to line and sweeps camera.
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| CN201810711063.6A CN108760755A (en) | 2018-07-03 | 2018-07-03 | A kind of dust granule detection method and device |
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| CN201810711063.6A CN108760755A (en) | 2018-07-03 | 2018-07-03 | A kind of dust granule detection method and device |
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| CN110441323A (en) * | 2019-07-11 | 2019-11-12 | 大族激光科技产业集团股份有限公司 | The method for polishing and system of product surface |
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